1) n can be any prime number, by definitionAkansha wrote:If integer n is > 1, is n = 2?
a. n has exactly 2 positive factors
b. The difference of any 2 distinct positive factors of n is odd
OA is B
2) n cannot be an odd number, because every odd number has 1 and itself as a factor, and the difference between these is always even. Except for 2, every even number has 2 and itself as a factor, and that difference is always even. Two only has two factors, 2 and 1, and that difference is odd.
B is sufficient.
